{"id":"CVE-2026-45266","state":"PUBLISHED","title":"Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling","description":"Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.","publishedAt":"2026-06-01T16:39:56.879Z","updatedAt":"2026-06-01T17:40:19.878Z","severity":{"score":3.5,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["nextcloud security-advisories"],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 21.1.10","status":"affected"},{"version":"< 22.0.11","status":"affected"},{"version":"< 23.0.3","status":"affected"}]}],"references":["https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35","https://github.com/nextcloud/spreed/pull/17577","https://hackerone.com/reports/3636758"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45266.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45266","state":"PUBLISHED","datePublished":"2026-06-01T16:39:56.879Z","dateUpdated":"2026-06-01T17:40:19.878Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-11T18:41:13.156Z"},"containers":{"cna":{"title":"Nextcloud: Unauthorized force-mute from missing permission check when using internal signaling","descriptions":[{"lang":"en","value":"Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3."}],"affected":[{"vendor":"nextcloud","product":"security-advisories","versions":[{"version":"< 21.1.10","status":"affected"},{"version":"< 22.0.11","status":"affected"},{"version":"< 23.0.3","status":"affected"}]}],"references":[{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35","name":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-x75r-65hm-cw35","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/nextcloud/spreed/pull/17577","name":"https://github.com/nextcloud/spreed/pull/17577","tags":["x_refsource_MISC"]},{"url":"https://hackerone.com/reports/3636758","name":"https://hackerone.com/reports/3636758","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-01T16:39:56.879Z"},"source":{"advisory":"GHSA-x75r-65hm-cw35","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T17:35:39.122672Z","id":"CVE-2026-45266","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-01T17:40:19.878Z"}}]}}}